Should overweight people be forced to lose weight to protect against Covid?

Being overweight weakens your immune system. People with weaker immune systems take longer to kill viruses. This means that overweight people are contagious for a longer period of time, when compared to a fit person with a healthy immune system. Should we restrict their diets and mandate exercise to reduce the transmission window of Covid infections in overweight people?
Should overweight people be forced to lose weight to protect against Covid?
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